Air-cleaning device



FIG. 1 is a top, front and side perspective view of an air-cleaning device showing a first embodiment of my new design;

FIG. 2 is a top, rear and side perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a left side elevational view thereof;

FIG. 8 is a right side elevational view thereof;

FIG. 9 is a top, front and side perspective view of an air-cleaning device showing a second embodiment of my new design;

FIG. 10 is a top, rear and side perspective view thereof;

FIG. 11 is a front elevational view thereof;

FIG. 12 is a rear elevational view thereof;

FIG. 13 is a top plan view thereof;

FIG. 14 is a bottom plan view thereof;

FIG. 15 is a left side elevational view thereof; and,

FIG. 16 is a right side elevational view thereof. 

The ornamental design for an air-cleaning device, as shown and described. 